Inflatable punching device

An inflatable punching device, comprising:

• a portable base for ground support with a hollow casing that confines a receiving space therein and that has an inlet for filling said receiving space;
• an engaging rod projecting vertically from said casing;
• a tube-like spring coil provided vertically on said casing, said engaging rod being squeezed into a lower end of said tube-like spring coil;
• a connecting rod having a bottom end squeezed into an upper end of said tube-like spring coil so that said tube-like spring coil engages resiliently said engaging rod and said connecting rod together and permits said connecting rod to extend vertically from said tube-like spring coil;
• and
• an inflatable cylinder-shaped bag being made of an air impermeable material and having two opposed ends, a tubular member having only one open end being disposed in said cylinder-shaped bag and being formed integrally with said cylinder-shaped bag, said tubular member extending substantially the full length of said bag axially from one of said opposed ends to define a blind bore in said cylinder-shaped bag, said connecting rod having substantially its full length inserted tightly into said blind bore so as to retain said cylinder-shaped bag on said connecting rod, said cylinder-shaped bag further having valve means connected thereto.